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#!/usr/bin/env python
# Copyright 2018 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Sample command-line program for interacting with the Cloud Tasks API.
See README.md for instructions on setting up your development environment
and running the scripts.
"""
import argparse
def create_task(project, queue, location):
# [START cloud_tasks_create_task]
"""Create a task for a given queue with an arbitrary payload."""
from google.cloud import tasks_v2beta2
# Create a client.
client = tasks_v2beta2.CloudTasksClient()
# Prepare the payload of type bytes.
payload = 'a message for the recipient'.encode()
# Construct the request body.
task = {
'pull_message': {
'payload': payload,
}
}
# Construct the fully qualified queue name.
parent = client.queue_path(project, location, queue)
# Use the client to build and send the task.
response = client.create_task(parent, task)
print('Created task: {}'.format(response.name))
return response
# [END cloud_tasks_create_task]
def lease_task(project, queue, location):
# [START cloud_tasks_lease_and_acknowledge_task]
"""Lease a single task from a given queue for 10 minutes."""
from google.cloud import tasks_v2beta2
# Create a client.
client = tasks_v2beta2.CloudTasksClient()
# Construct the fully qualified queue name.
parent = client.queue_path(project, location, queue)
lease_duration = {'seconds': 600}
# Send lease request to client.
response = client.lease_tasks(
parent, lease_duration, max_tasks=1, response_view='FULL')
task = response.tasks[0]
print('Leased task {}'.format(task.name))
return task
def acknowledge_task(task):
"""Acknowledge a given task."""
from google.cloud import tasks_v2beta2
# Create a client.
client = tasks_v2beta2.CloudTasksClient()
# Send request to client to acknowledge task.
client.acknowledge_task(task.name, task.schedule_time)
print('Acknowledged task {}'.format(task.name))
# [END cloud_tasks_lease_and_acknowledge_task]
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter)
subparsers = parser.add_subparsers(dest='command')
create_task_parser = subparsers.add_parser(
'create-task',
help=create_task.__doc__)
create_task_parser.add_argument(
'--project',
help='Project ID.',
required=True,
)
create_task_parser.add_argument(
'--queue',
help='Queue ID (short name).',
required=True,
)
create_task_parser.add_argument(
'--location',
help='Location of the queue, e.g. \'us-central1\'.',
required=True,
)
lease_and_ack_parser = subparsers.add_parser(
'lease-and-ack-task',
help=create_task.__doc__)
lease_and_ack_parser.add_argument(
'--project',
help='Project ID.',
required=True,
)
lease_and_ack_parser.add_argument(
'--queue',
help='Queue ID (short name).',
required=True,
)
lease_and_ack_parser.add_argument(
'--location',
help='Location of the queue, e.g. \'us-central1\'.',
required=True,
)
args = parser.parse_args()
if args.command == 'create-task':
create_task(args.project, args.queue, args.location)
if args.command == 'lease-and-ack-task':
task = lease_task(args.project, args.queue, args.location)
acknowledge_task(task)